Duck escapes from two-wheeled vehicle — this duck? (6)
I believe the answer is:
scoter
'this duck?' is the definition.
(scoter is a kind of duck)
'duck escapes from two-wheeled vehicle' is the wordplay.
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'escapes from' is a deletion indicator.
'two-wheeled vehicle' becomes 'scooter' (I've seen this in another clue).
'scooter' with 'o' taken away is 'SCOTER'.
(Other definitions for scoter that I've seen before include "Sea duck" , "Diving duck with black plumage" , "Species of diving duck" , "Sea diver" , "Duck - escort (anag)" .)